Minerals and vitamins share which characteristic?
a. They help enzymes function.
b. They are both organic.
c. They are both inorganic.
d. Both A and B above.
a. They help enzymes function.
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Of the different sources of genetic variability which on could be defined as permanent, transmissible changes to the DNA coding sequence that are often caused by outside environmental factors?
A) independent assortment B) crossing over C) random fertilization D) mutation
Which of the following is characteristic of carbohydrates?
A) all of the above. B) They contain C, H, O, with twice as many hydrogen as oxygen atoms. C) They provide much of the energy that the cell requires. D) They include sugars and starches.
Which structure encloses the pituitary gland?
A) 4 B) 5 C) 6 D) 7 E) 8
The body system that provides support and protection as well as being a site of blood cell production (hemopoiesis) is the ____________ system.
A. skeletal ?B. muscular ?C. cardiovascular ?D. respiratory ?E. lymphatic